I am looking at buying a 560 SEC which has the classic problem below the rear screen - very corroded and needs to be cut out and replaced. Any ideas of what this is likely to cost me in London, UK. I guess that I will need a new seal and screen too (no sign of screen fogging up though)? Also, does anyone know if there is an oil discharge on this car, if the engine oil level is too high? There seems to be a leak from quite high up on right hand side of the engine, but this doesn't seem to be leaving any marks on the ground. Thanks in advance